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Firefox MEDIUM 6.5
CVE-2026-12309

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.3
CVE-2026-12308

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0.0+
Fix from $1,600 2026-06-16
Firefox CRITICAL 9.1
CVE-2026-12304

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and…

Fix: 140.12.0 / 152.0.0+
Fix from $2,300 2026-06-16
Firefox HIGH 7.5
CVE-2026-12305

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0.0+
Fix from $1,950 2026-06-16
Firefox MEDIUM 6.5
CVE-2026-12302

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 15…

Fix: 140.12.0 / 152.0.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.4
CVE-2026-12298

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.4
CVE-2026-12299

JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbir…

Fix: 115.37.0 / 140.12.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.3
CVE-2026-12300

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Fix: 152.0.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.3
CVE-2026-12301

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Fix: 152.0.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.3
CVE-2026-12306

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0.0+
Fix from $1,600 2026-06-16
Firefox MEDIUM 5.3
CVE-2026-12307

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Fix: 140.12.0 / 152.0.0+
Fix from $1,600 2026-06-16
Firefox CRITICAL 9.8
CVE-2026-12293

Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Fix: 152.0.0+
Fix from $2,300 2026-06-16
Firefox CRITICAL 9.6
CVE-2026-12294

Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, a…

Fix: 115.37.0 / 140.12.0+
Fix from $2,300 2026-06-16
Firefox CRITICAL 9.6
CVE-2026-12295

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152…

Fix: 115.37.0 / 140.12.0+
Fix from $2,300 2026-06-16
Firefox CRITICAL 9.6
CVE-2026-12296

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and T…

Fix: 140.12.0 / 152.0.0+
Fix from $2,300 2026-06-16
Firefox CRITICAL 9.6
CVE-2026-12297

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Fir…

Fix: 115.37.0 / 140.12.0+
Fix from $2,300 2026-06-16
Firefox HIGH 8.8
CVE-2026-12289

Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thund…

Fix: 115.37.0 / 140.12.0+
Fix from $1,950 2026-06-16
Firefox HIGH 8.8
CVE-2026-12291

Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 15…

Fix: 115.37.0 / 140.12.0+
Fix from $1,950 2026-06-16
Firefox HIGH 8.1
CVE-2026-12290

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thu…

Fix: 115.37.0 / 140.12.0+
Fix from $1,950 2026-06-16
Firefox HIGH 8.1
CVE-2026-12292

Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thund…

Fix: 140.12.0 / 152.0.0+
Fix from $1,950 2026-06-16
Focus HIGH 7.5
CVE-2026-11799

UXSS in Focus for iOS / Klar Webkit navigation. This vulnerability was fixed in Focus for iOS 151.3.1 and Klar for iOS 151.3.1.

Fix: 151.3.1+
Fix from $1,950 2026-06-09
Firefox HIGH 7.5
CVE-2026-10701

Incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 151.0.3.

Fix: 151.0.3+
Fix from $1,950 2026-06-02
Firefox MEDIUM 5.4
CVE-2026-9308

Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a…

Fix: 151.2+
Fix from $1,600 2026-06-01
Firefox MEDIUM 5.4
CVE-2026-9309

Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View beha…

Fix: 151.2+
Fix from $1,600 2026-06-01
Firefox MEDIUM 5.4
CVE-2026-9078

Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A …

Fix: 151.1+
Fix from $1,600 2026-05-25
Firefox MEDIUM 6.5
CVE-2026-8706

Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs …

Fix: 151.0+
Fix from $1,600 2026-05-19
Firefox HIGH 8.8
CVE-2026-8975

Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we …

Fix: 115.36.0 / 140.11+
Fix from $1,950 2026-05-19
Firefox HIGH 8.8
CVE-2026-8970

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140…

Fix: 140.11 / 140.11.0+
Fix from $1,950 2026-05-19
Firefox HIGH 8.8
CVE-2026-8972

Privilege escalation in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Fix: 151.0.0+
Fix from $1,950 2026-05-19
Firefox HIGH 8.8
CVE-2026-8973

Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of the…

Fix: 151.0.0+
Fix from $1,950 2026-05-19